EP0789344A1 - Position determination system for vehicle - Google Patents

Position determination system for vehicle Download PDF

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Publication number
EP0789344A1
EP0789344A1 EP97101523A EP97101523A EP0789344A1 EP 0789344 A1 EP0789344 A1 EP 0789344A1 EP 97101523 A EP97101523 A EP 97101523A EP 97101523 A EP97101523 A EP 97101523A EP 0789344 A1 EP0789344 A1 EP 0789344A1
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EP
European Patent Office
Prior art keywords
vehicle
position determination
determination system
data
traffic monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97101523A
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German (de)
French (fr)
Inventor
Werner Schrimpf
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Individual
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Individual
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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/052—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed
    • G08G1/054—Detecting movement of traffic to be counted or controlled with provision for determining speed or overspeed photographing overspeeding vehicles
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/09675—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where a selection from the received information takes place in the vehicle
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096791—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is another vehicle
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096805—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route
    • G08G1/096827—Systems involving transmission of navigation instructions to the vehicle where the transmitted instructions are used to compute a route where the route is computed onboard
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
    • G08G1/096855—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver
    • G08G1/096872—Systems involving transmission of navigation instructions to the vehicle where the output is provided in a suitable form to the driver where instructions are given per voice

Abstract

The road vehicle is fitted with a global positioning system that uses satellite signals to define the precise position of the vehicle. At the start of the journey the position is logged and the position of all relevant traffic monitoring devices , eg cameras, radar is provided , eg CD-ROM, radio link. The vehicle position is compared with the location of such devices. As the vehicle approaches the monitoring devices an optical or acoustic indicator is activated.

Description

Navigationssysteme für nicht spurgebundene Fahrzeuge wie Kraftfahrzeuge sind beispielsweise aus der Prospektdruckschrift "Bosch-TravelPilot - und Sie wissen immer wo's langgeht" der Robert Bosch GmbH bekannt. Das als "TravelPilot" bezeichnete Gerät umfaßt eine autonome, mit Koppelortung arbeitende Navigationseinrichtung, gespeicherte Straßenpläne sowie einen Navigationsrechner.Navigation systems for non-track-bound vehicles such as motor vehicles are known, for example, from the brochure "Bosch TravelPilot - and you always know where to go" from Robert Bosch GmbH. The device designated as "TravelPilot" comprises an autonomous navigation device working with a coupling location, stored street maps and a navigation computer.

Das Fahrzeug verfügt dabei über eine Antenne und einen Empfänger, der die Satellitensignale des sogenannten "Global Positioning System" empfängt und an einen Navigationsrechner weiterleitet, der die jeweils ermittelte Fahrzeugposition mit einer in einem Datenspeicher gespeicherten digitalen Landkarte vergleicht.The vehicle has an antenna and a receiver which receives the satellite signals of the so-called "Global Positioning System" and forwards them to a navigation computer which compares the vehicle position determined in each case with a digital map stored in a data memory.

Bei dem bekannten Satelliten-Navigationssystem können auch relativistische Einflußgrößen berücksichtigt werden, so daß hierbei eine Positionsbestimmung mit einer Genauigkeit von wenigen Metern möglich ist.In the known satellite navigation system, relativistic influencing factors can also be taken into account, so that a position determination with an accuracy of a few meters is possible.

Die jeweils ermittelte Position des Fahrzeuges wird den Fahrzeuginsassen bei Bedarf über akustische oder optische Informationsträger angegeben, so daß der Fahrzeugführer in die Lage versetzt wird, das zuvor einprogrammierte Reiseziel auf kürzestem Wege zu erreichen.The position of the vehicle determined in each case is indicated to the vehicle occupants as required via acoustic or optical information carriers, so that the vehicle driver is able to reach the previously programmed travel destination in the shortest possible way.

Damit das bekannte Navigationssystem auch dann noch funktionsfähig ist, wenn die entsprechenden Satellitensignale beispielsweise im Funkschatten von Tunnels, Häusern oder dergleichen nicht empfangen werden können, ist der Navigationsrechner alternativ auch mit einem fahrzeugseitigen Positionsbestimmungssystem verbunden, das einen Kompaß und Bewegungssensoren umfaßt, die im Radbereich angeordnet sind. Durch dieses alternative Positionsbestimmungssystem wird eine zweite Datenmenge zur Bearbeitung durch den Navigationsrechner geliefert, durch die zumindest kurzfristig ein Ausfall der Satellitensignale überbrückt werden kann.So that the known navigation system is still functional If, for example, the corresponding satellite signals cannot be received in the radio shadow of tunnels, houses or the like, the navigation computer is alternatively also connected to a vehicle-side position determination system which comprises a compass and motion sensors which are arranged in the wheel area. This alternative position determination system provides a second quantity of data for processing by the navigation computer, by means of which a failure of the satellite signals can be bridged at least for a short time.

Ausgehend von diesem Positionsbestimmungssystem wird in der DE 3925057 vorgeschlagen, im Navigationssystem zusätzliche, im Straßenplan angeordnete Auslösepunkte zu speichern, deren Lage dem Fahrer bei Annäherung signalisiert wird. Derartige Auslösepunkte können z. B. Haltestellen oder Sehenswürdigkeiten sein.Starting from this position determination system, DE 3925057 proposes storing additional triggering points arranged in the road map in the navigation system, the position of which is signaled to the driver when the vehicle is approaching. Such trigger points can e.g. B. stops or sights.

Ein weiteres Navigationssystem ist aus der DE 4327780 A1 bekannt. Bei diesem System werden zusätzliche Fahrstrecken-Informationen über durchfahrene Kreuzungen erfaßt, wodurch Fehler in der ermittelten und angezeigten aktuellen Position vermindert werden sollen.Another navigation system is known from DE 4327780 A1. With this system, additional route information about intersections passed is acquired, which is intended to reduce errors in the determined and displayed current position.

Mit den beschriebenen Navigationssystemen bzw. den im Rechner gespeicherten Daten ist es bisher jedoch nicht möglich, Informationen darüber zu erhalten, ob sich das Fahrzeug einer mobilen oder fest installierten Verkehrsüberwachungseinrichtung nähert. Zu diesem Zweck werden bisher sogenannte Radarwarner eingesetzt, die z. B. Radarstrahlen von Geschwindigkeits-Überwachungseinrichtungen erfassen und eine entsprechende Meldung an den Fahrzeugführer geben. Die Verwendung derartiger Warngeräte ist jedoch in bestimmten Ländern verboten, obwohl es durchaus wünschenswert wäre, wenn der Fahrer rechtzeitig einen entsprechenden Hinweis erhalten würde.With the described navigation systems or the data stored in the computer, however, it has so far not been possible to obtain information as to whether the vehicle is approaching a mobile or permanently installed traffic monitoring device. So-called radar detectors have been used for this purpose. B. Detect radar beams from speed monitoring devices and give a corresponding message to the driver. However, the use of such warning devices is prohibited in certain countries, although it would be very desirable if the driver were informed of this in good time.

Es kommt nämlich, selbst dann, wenn der Fahrer die vorgeschriebene Geschwindigkeit einhält, beim plötzlichen Anblick einer Überwachungskamera oder eines Geschwindigkeitsmeßgerätes oft zu einer spontanen Vollbremsung, wodurch der Fahrer sich selber, die Fahrzeuginsassen und auch den nachfolgenden Verkehr gefährdet.This is because, even when the driver keeps to the prescribed speed, the sudden sight comes a surveillance camera or a speedometer often cause the brakes to brake spontaneously, which means that the driver endangers himself, the vehicle occupants and also the following traffic.

Dadurch wird der Zweck der Überwachungseinrichtungen, den Verkehrsteilnehmer z. B. durch Einhalten der vorgeschriebenen Geschwindigkeit oder verkehrsangepaßtes Fahren in besonders gefährdeten Bereichen vor Unfällen zu schützen, häufig verfehlt.As a result, the purpose of the monitoring devices, the road users z. B. by maintaining the prescribed speed or traffic-adapted driving to protect against accidents in particularly hazardous areas, often missed.

Der Erfindung liegt die Aufgabe zugrunde, ein Positionsbestimmungssystem zu schaffen, das den Kraftfahrer rechtzeitig bei der Annäherung an Verkehrsüberwachungseinrichtungen auf deren Vorhandensein aufmerksam macht.The invention has for its object to provide a position determination system that makes the driver aware of their presence in good time when approaching traffic monitoring devices.

Diese Aufgabe wird erfindungsgemäß durch die im Patentanspruch 1 aufgeführten Merkmale gelöst.This object is achieved by the features listed in claim 1.

Um diese Daten, beispielsweise die Positonen von kameraüberwachten Ampeln, Induktionsschleifen oder Radarmeßgeräten zur Verfügung stellen zu können, ist ein Datenspeicher in Form einer CD-ROM, einer Diskette oder dergleichen vorgesehen. Diese Daten können beispielsweise mittels eines CD-ROM-Laufwerkes abgefragt werden und, nach dem Vergleich der vom Rechner ermittelten Position mit den gespeicherten Positionsdaten der Überwachungsgeräte, optisch und/oder akustisch angezeigt werden.In order to be able to provide these data, for example the positions of traffic lights monitored by cameras, induction loops or radar measuring devices, a data memory in the form of a CD-ROM, a floppy disk or the like is provided. This data can be queried, for example, by means of a CD-ROM drive and, after comparing the position determined by the computer with the stored position data of the monitoring devices, can be displayed optically and / or acoustically.

Bei dem erfindungsgemäßen System kann der Datenspeicher darüber hinaus einen Teilspeicher aufweisen, der über Funksignale programmiert werden kann.In the system according to the invention, the data memory can also have a partial memory that can be programmed via radio signals.

Dadurch gelingt auch die Verfügbarmachung der Standorte von mobilen Verkehrsüberwachungseinrichtungen, deren Standort durch aufmerksame Autofahrer telefonisch beispielsweise Verkehrsfunksendern bekanntgegeben wird. Diese können die entsprechenden Daten mit Hilfe bestimmter Funkcodes direkt in den Speicher des Rechners eingeben.This also makes it possible to make the locations of mobile traffic monitoring devices available, the location of which is announced by attentive motorists, for example, traffic radio stations by telephone. With the help of certain radio codes, they can enter the corresponding data directly into the Enter the memory of the computer.

Die Information, daß sich das Fahrzeug einer Verkehrsüberwachungseinrichtung nähert, wird, wie bereits erwähnt, vorzugsweise mit Hilfe einer optischen oder akustischen Meldeeinrichtung weitergegeben, so daß sich der Fahrzeugführer rechtzeitig durch Anpassung seiner Fahrweise auf das Vorhandensein derartiger Einrichtungen einstellen kann.As already mentioned, the information that the vehicle is approaching a traffic monitoring device is preferably passed on with the aid of an optical or acoustic signaling device, so that the vehicle driver can adapt to the presence of such devices in good time by adapting his driving style.

Die Verwendung des erfindungsgemäßen Systems verstößt zumindest in Deutschland und anderen westeuropäischen Ländern nicht gegen einschlägige Vorschriften, da vom Fahrzeug selber keine Funksignale ausgesendet werden. Der Einsatz der nicht zugelassenen bisher üblichen Warngeräte wird dadurch überflüssig.The use of the system according to the invention does not violate any relevant regulations, at least in Germany and other Western European countries, since no radio signals are emitted by the vehicle itself. This makes the use of the previously unapproved warning devices usual.

Die Funktionsweise des erfindungsgemäßen Positionsbestimmungssystems wird anhand des folgenden Ablaufdiagrammes beispielsweise veranschaulicht und im einzelnen erläutert.The mode of operation of the position determination system according to the invention is illustrated, for example, using the following flow chart and explained in detail.

Bei Inbetriebnahme des Fahrzeuges wird zunächst der Rechner eingeschaltet, der z. B. mittels der satellitenseitigen Signale eine Positionsbestimmung des aktuellen Standortes des Fahrzeuges vornimmt. Anschließend werden die Positionskoordinaten der Verkehrsüberwachungseinrichtungen z. B. mittels eines CD-ROM-Laufwerkes oder des funkprogrammierbaren Teilspeichers eingelesen und mit dem berechneten Positionskoordinaten des Fahrzeuges verglichen. Dieser Abgleich wird beim Fortbewegen des Fahrzeuges ständig aktualisiert, so daß bei einer Annäherung des Fahrzeuges an eine gespeicherte Verkehrsüberwachungseinrichtung eine optisch und/oder akustische Meldung an den Fahrzeugführer erfolgen kann.When the vehicle is started up, the computer is first switched on. B. makes a position determination of the current location of the vehicle by means of the satellite signals. The position coordinates of the traffic monitoring devices are then z. B. read by means of a CD-ROM drive or the radio programmable partial memory and compared with the calculated position coordinates of the vehicle. This adjustment is constantly updated when the vehicle is moving, so that when the vehicle approaches a stored traffic monitoring device, an optical and / or acoustic message can be sent to the vehicle driver.

Die bekannten satellitengestützten Navigationssysteme können problemlos mit dem erfindungsgemäßen System kombiniert werden.

Figure imgb0001
The known satellite-based navigation systems can be easily combined with the system according to the invention.
Figure imgb0001

Claims (3)

Positionsbestimmungssystem für Kraftfahrzeuge, bei dem ein Rechner mittels der von mehreren Satelliten gesendeten elektromagnetischen Signale und/oder der von einem fahrzeugseitigen, einen Kompaß und Bewegungssensoren umfassenden Positionsbestimmungssystem gelieferten Daten die jeweilige Fahrzeugposition berechnet, wobei der Datenspeicher Daten über die Positionskoordinaten von optischen und/oder elektronischen Verkehrsüberwachungseinrichtungen enthält und das System eine optische und/oder akustische Meldeeinrichtung umfaßt, die die Annäherung des Fahrzeuges an eine im Datenspeicher gespeicherte Verkehrsüberwachungseinrichtung anzeigt.Position determination system for motor vehicles, in which a computer calculates the respective vehicle position by means of the electromagnetic signals transmitted by several satellites and / or the data supplied by a position determination system provided on the vehicle, comprising a compass and motion sensors, the data storage unit storing data about the position coordinates of optical and / or electronic ones Contains traffic monitoring devices and the system comprises an optical and / or acoustic signaling device which indicates the approach of the vehicle to a traffic monitoring device stored in the data memory. Positionsbestimmungssystem nach Anspruch 1, dadurch gekennzeichnet, daß der Datenspeicher als CD-ROM ausgebildet ist.Position determination system according to claim 1, characterized in that the data memory is designed as a CD-ROM. Positionsbestimmungssystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Datenspeicher einen über Funksignale programmierbaren Teilspeicher aufweist.Position determination system according to claim 1 or 2, characterized in that the data memory has a partial memory programmable via radio signals.
EP97101523A 1996-02-10 1997-01-31 Position determination system for vehicle Withdrawn EP0789344A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996104892 DE19604892C1 (en) 1996-02-10 1996-02-10 Positioning system for motor vehicles
DE19604892 1996-02-10

Publications (1)

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
DE19901808A1 (en) * 1999-01-19 2000-07-20 Volkswagen Ag Display device for vehicle speed converts received data signal into suitable format for processor that displays maximum permitted speed on tachometer via display controller
GB2353160A (en) * 1999-06-02 2001-02-14 Nicholas Gale Automatic display of local information
GB2353647A (en) * 1999-08-24 2001-02-28 Martin Burch Speed trap warning system
GB2358749A (en) * 2000-01-26 2001-08-01 Timothy Michael Rock Speed trap warning system
GB2368990A (en) * 2000-11-13 2002-05-15 Iprox Ltd Location dependent display of material
GB2370436A (en) * 2000-01-26 2002-06-26 Origin Technologies Ltd Speed trap detection and warning system
GB2371432A (en) * 2000-01-26 2002-07-24 Origin Technologies Ltd Speed trap warning system
GB2377106A (en) * 2001-01-31 2002-12-31 Yupiteru Ind Co Ltd Vehicle mounted target detecting apparatus and microwave detector
EP1271446A1 (en) * 2001-06-18 2003-01-02 Origin Technologies Limited Speed trap detection and warning system
WO2004017276A1 (en) * 2002-08-19 2004-02-26 Nathaniel Davidson Vehicle identification means detection and evasion system
FR2866437A1 (en) * 2004-02-13 2005-08-19 Delta System Comm Geographical point e.g. level crossing, approach warning device for e.g. car, has triggering unit to trigger sound and/or light alarm when distance between each geographical point position and vehicle position is less than given value
NL1026352C2 (en) * 2004-06-07 2005-12-15 Target Automotive B V Traffic control warning system for road users comprises data base with first location information covering traffic control points and receiver in vehicle for position information relative to vehicle
US7183942B2 (en) 2000-01-26 2007-02-27 Origin Technologies Limited Speed trap detection and warning system

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DE10257482A1 (en) * 2002-12-10 2004-07-01 Bert Ludwig Improvements in satellite navigation systems for road vehicles, also includes additional information of such as speed limits and delays
ES2425945T3 (en) 2006-06-27 2013-10-18 Tomtom International B.V. Navigation device and method for providing speed control alerts
DE102008007687A1 (en) * 2008-02-06 2009-08-13 GM Global Technology Operations, Inc., Detroit Assistance device for motor vehicle i.e. car, has control device for controlling observation of characteristic parameters, and optical display and acoustic signal device for informing driver about actual characteristic parameters
DE102010028107A1 (en) * 2010-04-22 2011-12-01 Robert Bosch Gmbh Method for assisting driver during driving vehicle from starting point to destination, involves determining bypass route from starting point to destination, and outputting basic route and bypass route to driver of vehicle

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19901808B4 (en) * 1999-01-19 2011-07-07 Volkswagen AG, 38440 Display device for displaying the speed of a vehicle
DE19901808A1 (en) * 1999-01-19 2000-07-20 Volkswagen Ag Display device for vehicle speed converts received data signal into suitable format for processor that displays maximum permitted speed on tachometer via display controller
GB2353160A (en) * 1999-06-02 2001-02-14 Nicholas Gale Automatic display of local information
GB2353647B (en) * 1999-08-24 2002-04-10 Martin Burch Detection warning systems
GB2353647A (en) * 1999-08-24 2001-02-28 Martin Burch Speed trap warning system
GB2353650A (en) * 1999-08-24 2001-02-28 Morpheous Ltd Speed trap warning device
GB2353650B (en) * 1999-08-24 2004-07-28 Morpheous Ltd Detection warning systems
EP1544637A2 (en) * 2000-01-26 2005-06-22 Origin Technologies Limited Speed trap detection and warning system
GB2358750B (en) * 2000-01-26 2002-02-20 Timothy Michael Rock Speed trap detection and warning system
GB2370436A (en) * 2000-01-26 2002-06-26 Origin Technologies Ltd Speed trap detection and warning system
GB2371432A (en) * 2000-01-26 2002-07-24 Origin Technologies Ltd Speed trap warning system
GB2371701A (en) * 2000-01-26 2002-07-31 Origin Technologies Ltd Speed trap warning
GB2370436B (en) * 2000-01-26 2002-08-07 Origin Technologies Ltd Speed trap detection and warning system
GB2371701B (en) * 2000-01-26 2002-10-02 Origin Technologies Ltd Speed trap detection and warning system
GB2358749A (en) * 2000-01-26 2001-08-01 Timothy Michael Rock Speed trap warning system
EP1544637A3 (en) * 2000-01-26 2009-07-01 Origin Technologies Limited Speed trap detection and warning system
US7183942B2 (en) 2000-01-26 2007-02-27 Origin Technologies Limited Speed trap detection and warning system
GB2358750A (en) * 2000-01-26 2001-08-01 Timothy Michael Rock Speed trap detection and warning; speed limit display
GB2368990A (en) * 2000-11-13 2002-05-15 Iprox Ltd Location dependent display of material
GB2377106B (en) * 2001-01-31 2003-10-01 Yupiteru Ind Co Ltd Vehicle-mounted target detecting apparatus and microwave detector
GB2377106A (en) * 2001-01-31 2002-12-31 Yupiteru Ind Co Ltd Vehicle mounted target detecting apparatus and microwave detector
GB2381143B (en) * 2001-06-18 2003-09-17 Origin Technologies Ltd Speed trap detection and warning system
GB2381143A (en) * 2001-06-18 2003-04-23 Origin Technologies Ltd Speed trap detection and warning system distinguishing between speed traps on a motorway and other roads
EP1271446A1 (en) * 2001-06-18 2003-01-02 Origin Technologies Limited Speed trap detection and warning system
WO2004017276A1 (en) * 2002-08-19 2004-02-26 Nathaniel Davidson Vehicle identification means detection and evasion system
US7076349B2 (en) 2002-08-19 2006-07-11 Ron Yaacov Davidson Vehicle identification means detection and evasion system
FR2866437A1 (en) * 2004-02-13 2005-08-19 Delta System Comm Geographical point e.g. level crossing, approach warning device for e.g. car, has triggering unit to trigger sound and/or light alarm when distance between each geographical point position and vehicle position is less than given value
NL1026352C2 (en) * 2004-06-07 2005-12-15 Target Automotive B V Traffic control warning system for road users comprises data base with first location information covering traffic control points and receiver in vehicle for position information relative to vehicle

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